Answer: 10kg
Explanation:
force applied by Ahmad = 100 N
box's acceleration = 10 m/s
mass of the box = ?
Recall that Force is the product of mass of an object by the acceleration by which it moves.
i.e Force = mass x acceleration
100N = mass x 10m/s
Mass = 100N / 10m/s
Mass = 10kg
Thus, the mass of the box is 10kg
Because it’s cheaper and efficient
Answer:
The pressure inside the hose 7000 Pa to the nearest 1000 Pa.
<em>
</em>
<em>
</em>
The pressure at the site of the puncture is <em>
</em>
Explanation:
<em>According to Poiseuille's law, 
</em>
<em>Where 
is the pressure at a point 
before the leak, 
is the pressure at the point of the leak 
, μ = dynamic viscosity, L = the distance between points and , Q = flow rate, D = the diameter of the garden hose. </em>
<em>Also, from the equation 
, the equations 
and 
can be derived.</em>
Combining Poseuille's law with the above, we get 
<em></em>
<em>
</em>
Since the hose has a uniform diameter, the nozzle at the end is closed and neither point <em> nor lie after the puncture,</em>
<em></em>
The pressure at the site of the puncture <em>
</em>
<em>
</em>
<em></em>
<em />
Answer:
e) half
Explanation:
as we know relation b/w charge(Q) , capacitance (C) and voltage (V) is
Q = CV ...........(i)
we also know capacitance of a capacitor for separation d and area A is
C = ∈₀A/d ...........(ii)
from the above equation it is clear that C is inversely proportional to separation if separation doubled capacitance will reduced to half and from equation first charge is directly proportional to capacitance.
that s why magnitude of charge will reduced to half
so option (e) is right answer
Answer:
3.9E-8
Explanation:
We know that
Mv²/r = Bqv
So
r= mv/Bq
But E is 1/2mv² which is 5.53eV
m²v² =2m x 5.53eV
mv = √( 2 x 9.1E-31)
So
r= √( 2 x9.1E-31 x 5.53)/ 7.83x10^-4 x1.6E-19
= 3.9x10-8cm
Explanation:
